Saturday

December 20, 2014

December 20, 2014

Total # Posts: 2,259

**math **

60 boys 80 girls
*December 7, 2010*

**algebra**

The natural stride up a certain staircase has a slope of 3/5, meaning that a run of 5 inches has a rise of 3 inches. The model for a standard staircase is y=(3/5)x Find the rise for a staircase constructed at a mansion which has a run of 12 inches. Not sure how to set equation up
*December 7, 2010*

**Chemistry**

A 0.5962g sample of iron ore is dissolved in acid producing Fe3+. Through a series of reactions, the iron precipitates as the Fe(OH)3. The precipitate is heated, forming solid Fe2O3. What is the mass % of iron in the sample if the analysis produced 0.3210g Fe2O3?
*December 6, 2010*

**11th grade**

From what i see your trying to convert 4000 grams of fe203 to moles, and then multiply the find the amount of fe203 in 3 moles of co2. So your answer would be 4000*3/ 159.68 = 75.2 mole of co2 .
*December 2, 2010*

**English**

1.He lived with his parents, brothers, and sisters. 2.Those in this small Mexican American community were worried and frightened. 3.That was the time when Cesar Chavez first lived among the migrant workers. 4.Chavez became a spokesperson for poor farmworkers. 5.In 1962, he ...
*November 30, 2010*

**5th grade math**

The number of pages is a 2-digit number. the number of photos on a page is a 1- digit number. the number of pages is 60 more than the number of photos on a page. the number of pages is divided by the number of photos on a page is 16. What is the number of pages?????????
*November 30, 2010*

**English**

1.Throughout his life, Chavez focused on nonviolent action. 2.He organized several boycotts of grapes and lettuce. 3.In California there was work for farmworkers if they could go from one farm to another. 4.In 1937, Cesar Chavez's family did not have enough money for the ...
*November 30, 2010*

**math**

the number of pages is a 2-digit number. the number of photos on a page is a 1- digit number. the number of pages is 60 more than the number of photos on a page. the number of pages is divided by the number of photos on a page is 16. What is the number of pages?????????
*November 30, 2010*

**math**

the number of pages is a 2-digit number. the number of photos on a page is a 1- digit number. the number of pages is 60 more than the number of photos on a page. the number of pages is divided by the number of photos on a page is 16. What is the number of pages?????????
*November 30, 2010*

**Physics**

A ball thrown horizontally at 18.3 m/s from the roof of a building lands 36.3 m from the base of the building. How tall is the building?
*November 30, 2010*

**Algebra**

Question: Looking below is this answer correct? If you follow the math, you reach the entire population before 8 hours have passed yet the solution says 8.86 hours.... Is the solution giving us the numbers in the set and not the actual elapsed hours??? Does anyone know why? ...
*November 30, 2010*

**algebra**

what is slope and y intercept for y=22.048x-19.464
*November 28, 2010*

**7th grade math**

SA=2pi(4 squared) + 2pi (4)(20)
*November 26, 2010*

**7th grade math**

30 = 12d
*November 26, 2010*

**ALGEBRA**

Thank you, i was checking my answer.
*November 21, 2010*

**ALGEBRA**

Express as a single logarithm and simplify: log x – log (8x) + 2 log 4
*November 21, 2010*

**trig**

find exact value cos(13pi/15)cos(-pi/5)-sin(13pi/15)sin(-pi/5)
*November 18, 2010*

**trig**

find exact value using sum or differnce equations. tan(19pi/12)
*November 18, 2010*

**pre-algebra (interests & percentss)**

$21.60
*November 18, 2010*

**statistics **

When a card is selected from a deck, find the probability of getting a diamond, a face card or a diamond, or a club and a king?
*November 18, 2010*

**physics**

an atwoods machine has a solid cylindrical pulley with a mass of 200g and a radius of 10cm. a 1.2 kg mass is hung on one side and a 1.1kg mass on the other side, find the acceleration of the two masses and the itme for them to travel a distance of 60cm
*November 17, 2010*

**chemistry**

A sample of a gas occupies a volume of 1158 mL at 59ºC and 0.76 atm. What would be the new volume if temperature decreases to 40ºC and pressure increases to 1.40 atm?
*November 17, 2010*

**Science: Chemistry**

A sample of a gas at 0.73 atm occupies a volume of 245 mL. If the temperature remains constant, what will be the new pressure if the volume increases to 633 mL?
*November 17, 2010*

**physics**

P fluid=r x h x g wher h =3.4m P total =P atmospheric + P fluid Normal atmospheric pressure = 1.01 x 10^5
*November 16, 2010*

**organic chemistry**

What is the product of reaction of triphenylmethanol heated up with 40% HI in glacial acetic acid and then treated with sodium bisulfite?
*November 16, 2010*

**English**

1.The castanets, which were quite old, had been Melanie's grandmother's. 2.You were always singing when you were little. 3.Three Indian elephants patiently towed the logs that had just been cut. 4.Stay with us as long as you want. 5.The Forbidden City, where China'...
*November 16, 2010*

**English**

1.Camels stamped and bellowed in annoyance when packs were put on them. 2.Aloe plants, which originated in Africa, are now widely available in the US. 3.As far as scientists can tell, there is no connection between these two events. 4.If you adjust the blinds, you won't ...
*November 16, 2010*

**Thermochemistry Ap Chem homework**

i used the formula m(delta T)Cp=delta H (10.0)(20.0-0.00)= x and so x = 200... is that correct, if so would the units be degrees celcius?
*November 15, 2010*

**Thermochemistry Ap Chem homework**

Any help would be great, even if it is just a way to start or a formula. Calculate the heat necessary to convert 10.0 g of water (just melted) at 0 degrees Celcius to water at 20 degrees Celcius, assuming that the specific heat remains constant at 1 cal/gram degrees celcius.
*November 15, 2010*

**algebra**

ãx8y5
*November 15, 2010*

**algebra**

need to find square root 292
*November 14, 2010*

**College algebra**

Solve for z 4(4-2z)+1=7(x+2(1-z))
*November 14, 2010*

**algebra**

determine the distance betwen the two points (5,12) and (11,-4)
*November 13, 2010*

**Chemistry**

Reacting Potassium carbonate with Barium chloride
*November 12, 2010*

**science**

what was the acceleration of an object between 8 and 10 seconds if velocity at 8 seconds is 10 mi/hr and 0 mi/hr at 10 seconds?
*November 12, 2010*

**7th grade math**

find a ratio equivalent to the ratio 7 over 9 then use the ratio to write a proportion
*November 11, 2010*

**English**

1.The Reverend Jesse Jackson spoke at the convention. 2.I wear heavy wool socks under my hiking boots. 3.Joel and Tina are participating in the Special Olympics. Identify prepositional phrase, tell if adj or adverb phrase then word that phrase modifies 1.at the convention-...
*November 8, 2010*

**physics BASIC PLEASE HELP**

Calculations and Data: Angle: As measured by protractor:7.63 degrees As measured by using inverse sin:7.4 degrees Percent error: ((True value-experimental value)/true value))*100= ((7.4-7.63)/7.4)*100=-3.1081% Time: 1.53s 1.4s 1.53s 1.44s 1.47s Average time= (total of times ...
*November 8, 2010*

**English**

2.rode 3.something 5.just
*November 8, 2010*

**English**

1.The hikers are ready for a break. 2.Yesterday we rode our bikes through the park. 3.That store has something for everyone. 4.Students from both South America and North America attended the meeting. 5.According to the map, Tony's farm is just ahead. Identify prepositional...
*November 8, 2010*

**12th grade**

if cos Q=5/9, find 5/9
*November 8, 2010*

**Math**

Ashley can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike?
*November 7, 2010*

**Physics**

A jet pilot is in a vertical loop. If the jet is moving at a speed of 1300 km per hour at the lowest point of the loop determine the minimum radius of the cirlce so that the centripetal acceleration at the lowest point does not exceed 6.0g's.
*November 7, 2010*

**Physics**

I just need help with c A long horizontal hose of diameter 4.2 cm is connected to a faucet. At the other end, there is a nozzle of diameter 2 cm. Water squirts from the nozzle at velocity 24 m/sec. Assume that the water has no viscosity or other form of energy dissipation. a) ...
*November 6, 2010*

**math**

a computer company can sell 1000 computers if they price them at $500. The number sold will increase by 10 for every 1$ decrease in the price. The company has fixed cost of $100,000, and each computer costs $300 to produce. Find the price that will maximize the company's ...
*November 4, 2010*

**English**

I have to add prepositional phrases to the following sentences. Please check to see if correct. 1.The carpenter repaired the roof. 2.The coach explained the play. 1.The carpenter repaired the roof in the house. 2.The coach down the street explained the play.
*November 3, 2010*

**Chemistry**

In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?
*November 2, 2010*

**Chemistry**

Suppose that you had a mercury-in-glass thermometer marked and calibrated to measure temperatures from -10 degrees celsius to 110 degrees celsius and you wished to measure a temperature of approximately 115 degrees celsius accurately. How might you use your thermometer to do it?
*November 2, 2010*

**math**

I need help with parametric equations, locus problems, tell me how to solve all questions if you can. Need help with one below: Tangents are drawn to a parabola x^2=4y from an external point A(x1,y1) touching the parabola at P and Q (a) Prove that the mid point, M, is the ...
*November 1, 2010*

**Chemistry**

How many electrons in an atom can have each of the following quantum number or sublevel designations? 1. n = 4, l = 3
*October 30, 2010*

**Physics**

How fast must a 138 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with A = 100. pm?
*October 28, 2010*

**4th grade**

how can you use an array to find partial products for 4x36?
*October 27, 2010*

**Ap Chemistry.**

okay, thank you!
*October 25, 2010*

**Ap Chemistry.**

Zn + 2HCl -> ZnCl2 + H2 If 7.29 g of Zinc reacted, how many liters of HCl were used? I know that i can't use mass volume conversion, because the HCl is not a gas...so what do i do?
*October 25, 2010*

**9th grade Math**

A rectangular floor that measures 3 m by 2 m is covered by 384 square tiles. Determine side length of each tile in centimeters Thanks!
*October 25, 2010*

**algebra**

bayside insurance offers two health plans. under plan A, Giselle would have to pay the first $130 of her medical bills, plus 40 % of the rest. Unde plan B, Giselle would pay the first $140, but only 35% of the rest. For what amount of medical bills will plan B save Giselle ...
*October 22, 2010*

**Physics **

A 100-N force has a horizontal component of 80 N and a vertical component of 60 N. The force is applied to a box which rests on a level frictionless floor. The cart starts from rest, and moves 2.0 m horizontally along the floor. What is the cart's final kinetic energy?
*October 21, 2010*

**Stats**

A random sample of two hundred fifteen adults is selected from a certain population of registered voters. Assume the population is 20% democrats. Use a normal approximation to estimate (a) the probability the sample contains exactly 48 democrats, and (b) the probability the ...
*October 21, 2010*

**math**

if you simplify the expression 3x+4(x-2)-3x into the expression 3x+ 4x -8-3x, what property did you use associative property commutative property distributive property identity property
*October 19, 2010*

**Chem**

Could you please tell me if these are right? How many moles are in the following. A.) 80.0 g of NaOH I got 2.0 moles. B.) 12.0 g of Ca(OH)2 I got 0.16 moles. Write the simplest formula for each of the following compounds. A.) 0.200 mole Al and 0.600 Cl. I got AlCl3 B.) 0.080 ...
*October 19, 2010*

**chem-Bob**

What pressure (atm) is exerted by a column of ethanol 65.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational constant. mass*gis the weight of the column density*h*area*g= weight density*h*g= pressure Thanks for your help Bob. The answer i got is...
*October 17, 2010*

**Chem**

The relationship between volume and pressure (at constant temperature) is directly proportional. my answer- True The relationship between pressure and temperature (at constant volume) is inversely proportional. my answer- True The relationship between volume and temperature (...
*October 17, 2010*

**physics**

What pressure (atm) is exerted by a column of ethanol 65.0 cm high? The density of ethanol is 0.789 g/cm3 and 9.8m/s2 as your gravitational
*October 17, 2010*

**physics**

need some help, A ball with an initial angular velocity of 20.0 rads /s and a rotational inertia of 0.4kgm rolls uphill with an acceleration of -4.00 rad/s . Calculate the net torque acting on the ball. Calculate the angular displacement after 5.00 s.
*October 16, 2010*

**accounting**

You can invest in 10 corporate bonds paying 7 percent interest 20 conservative stocks that pay substantial dividends(typically 5 percent of the stock price every year) and 30 growth oriented-technology stocks that pay no dividends. Analyze each alternative and select one.
*October 16, 2010*

**CHEM**

Could you please tell me if these are right? Write an equation for the following reactions. Write the correct formulas of the reactants and products. Then correctly balance each equation. A.) Potassium and oxygen gas react to form potassium oxide. I got K+O2=KO2 B.) Sodium and...
*October 15, 2010*

**Intro to Science**

A rock with a Weight of 156.8 newtons falls 5 meters. What potential energy does it have left before the end of its fall?
*October 14, 2010*

**5th grade math**

I don't get how to express the fraction 30/100 in 20ths.
*October 13, 2010*

**economics**

do you believe there are opportunity costs to furthering your education. if so what are they if not why
*October 12, 2010*

**Math**

Divide.round to the nearest hundredth.2.4 Divide by 9.984
*October 10, 2010*

**chem**

A gold nugget weighs 65.0 g. How many moles of gold are in the nugget? I got 12800 moles is this right?
*October 10, 2010*

**physics**

A ship sets out to sail to a point 174 km due north. An unexpected storm blows the ship to a point 132 km due east of its starting point. How far must it now sail to reach its original destination? In what direction must it now sail to reach its original destination?
*October 10, 2010*

**algebra**

Your friend has a cube of gold. You have a cube of gold that weighs twice as much. Your cube is 1.26as long as your friends, and it has 1.587 times the surface area. You can imagine how this would work with a spherical diamond, so we won't repeat that part here. Here is ...
*October 8, 2010*

**economics**

explain how the wage can adjust to balance the supply and demand for labor while simultaneously equaling the value of the marginal product of labor
*October 6, 2010*

**Chemistry**

CO2-3
*October 4, 2010*

**economics**

Do you feel there are any imbalances to our wage structure in our economy?
*October 4, 2010*

**Chemistry**

Is it possible to do it without stoich?
*October 3, 2010*

**Chemistry**

is that stoichiometry?
*October 3, 2010*

**Chemistry**

Suppose you tried to combine 42 grams of magnesium with 45 grams of oxygen. Which of the two substances would be left after the reaction? How much magnesium oxide will be formed?
*October 3, 2010*

**Chemistry**

why 12/44?
*October 3, 2010*

**Chemistry**

When one pound of gasoline (made up of compounds of hydrogen and carbon) is burned in an automobile approximately 3 pounds of carbon dioxide, CO2, is given off. Carbon dioxide is one of the gases contributing to global warming. What information from this experiment helps ...
*October 3, 2010*

**english**

At three pm i will be feeding the ducks.At the park. is this sentence a fragment
*October 2, 2010*

**Chemistry**

6.00M*.520L= 3.12Moles of NaOH 3.12 mols*40= 124.8 grams of NaOH
*September 30, 2010*

**6th grade English**

Each family of potters has its own special designs. I have to identify the action verb. Would it be has?
*September 29, 2010*

**7th grade**

What is a 12 letter word for observations involving descriptions based on instrument measurment?
*September 29, 2010*

**college-accounting**

Choose two competitor companies that are U.S. GAAP publicly traded companies.
*September 28, 2010*

**economics**

name two competitor companies that are U.S. GAAP publicly traded companies
*September 28, 2010*

**economics**

out of the four economic market models : competitive market, monopoly market, monopolistic competition and oligopoly in your opinion which is the best market model and which is the worst
*September 28, 2010*

**Gym**

Does anybody know anything about Tim Tebow? I have to write an essay on him.
*September 27, 2010*

**History**

I learned what these terms are, but I still want to know how they are important to geek history.
*September 27, 2010*

**History**

How are peninsulas, city-states, and polytheism important to greek history?
*September 27, 2010*

**Social Studies**

I want to know Europe's relative location. Please help.
*September 27, 2010*

**economics**

out of the four economic market models : competitive market, monopoly market, monopolistic competition and oligopolywhich is the best market model and which is the worst
*September 26, 2010*

**economics**

out of the four economic market models which is the best market model and which is the worst
*September 26, 2010*

**history**

the differences between asia, eurasia,and europe and the impact it had on the international state of affairs in 1450
*September 26, 2010*

**history**

how were the differences important to the international state of affairs in 1450?
*September 26, 2010*

**economics**

What did the study described in “The Value of Human (?) Capital” train low ranking monkeys to do?
*September 24, 2010*

**economics**

When policymakers set prices by legal decree, they a. improve the organization of economic activity. b. obscure the signals that normally guide the allocation of society’s resources. c. are usually following the advice of mainstream economists. d. are demonstrating a ...
*September 24, 2010*

**economics**

Two goods are complements when a decrease in the price of one good a. decreases the quantity demanded of the other good. b. increases the quantity demanded of the other good. c. increases the demand for the other good. d. decreases the demand for the other good.
*September 24, 2010*

**math**

so is 0.09524 move decimal two places to the right is it 9.52%or is it 9.524%
*September 24, 2010*

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